CO2 is one of the major combustion products which once released into the air can contribute to global climate change. Solid sorbents have been reported to be promising candidates for CO2 sorbent applications due to their high CO2 absorption capacities at moderate working temperatures. However, at a given CO2 pressure, the turnover temperature (Tt) of an individual solid capture CO2 reaction is fixed and may be outside the operating temperature range (ΔTo) for a particularly capture technology. In order to shift such Tt of a solid into the range of ΔTo, its corresponding thermodynamic property must be changed by changing its structure through reacting (mixing) with other materials or doping with other elements. In this study, through investigating several mixed sorbent materials, we demonstrate that by mixing/doping different types of solids it’s possible for a sorbent to shift its Tt to the range of practical operating temperature conditions.

Computational modeling of mixing solids as high-performance CO2 sorbents for capture technology

2019 Fall National Meeting

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